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NutritionandGrowthLecture - NUTRITION AND GROWTH EVERY...

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NUTRITION AND GROWTH
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EVERY LIVING ORGANISM MUST ACQUIRE 2 THINGS FROM ITS ENVIRONMENT IF IT IS TO GROW AND REPRODUCE: STRUCTURAL UNITS ENERGY SOURCE GROUPING ORGANISMS BASED ON NUTRITIONAL REQUIREMENTS: PHOTOHETEROTROPHS PHOTOAUTOTROPHS CHEMOHETEROTROPHS CHEMOAUTOTROPHS
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EXAMPLES OF ORGANISMS FOUND IN EACH GROUP HOW DO ORGANISMS ACQUIRE THEIR NUTRITIONAL NEEDS? IT IS PROVIDED TO THEM IN A MEDIUM MEDIA - LAB OR ENVIRONMENT ALL MEDIA MUST HAVE THE FOLLOWING CHEMICAL ELEMENTS FOR GROWTH - CARBON (C) - NITROGEN (N) - WATER(H 2 O) - MINERALS(S,P,Ca,Mg,Na, etc.)
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CARBON SOURCES: 1)CARBON DIOXIDE; 2)CARBOHYDRATES
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CARBOHYDRATES ARE SELECTED BECAUSE: WATER SOLUBLE READILY ACCESSIBLE IN LAB AND NATURE USUALLY NON TOXIC IN DILUTE CONCENTRATION EASILY OXIDIZED AND REDUCED, LITTLE MODIFICATION NEEDED
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SOME ORGANISMS CAN NOT USE CARBOHYDRATES AS A CARBON SOURCE.
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